Know all about Rhomb Porphyry and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Rhomb Porphyry and Tachylite belong to Igneous Rocks.Texture of Rhomb Porphyry is Aphanitic to Porphyritic whereas that of Tachylite is Vitreous. Rhomb Porphyry appears Rough and Tachylite appears Glassy. The luster of Rhomb Porphyry is subvitreous to dull while that of Tachylite is resinous. Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Rhomb Porphyry are an oil and gas reservoir, as a feed additive for livestock, metallurgical flux, soil conditioner, source of magnesia (mgo) and that of Tachylite are cemetery markers, creating artwork.